/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/Accessibility/GenericAccessibleInterfaces.h
Returns the accessible user associated with the passed in user index. If the passed in user index is not associated with any accessible user, nullptr is returned.
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FGenericAccessibleUser](API\Runtime\ApplicationCore\GenericPlatform\Accessibility\FGenericAccessibleUser) > GetUser ( const FAccessibleUserIndex UserIndex ) const